William c



W. C. BRINTON, Jn.

SWITCH BOX.

APPLICATION FILED ocT.24. 1916.

Patented Nov. 18, 1919.

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UNITED sTATEs PATENT oEEioE.

WILLIAM BRINT'ON, JR., 0F KENNETT SQUARE, PENNSYLVANIA, ASSIGNORTO -PHILIPS-B`RINTON COMPANY, 0F KEN NETT SQUARE. PENNSYLVANIA, A COR- PORATION 0F PENNSYLVANIA.

SWITCH-BOX.

rseigsoa Specification of Letters Patent.

Patented N ov. 18, 1919.

Application filed October 24, 1916. Serial No. 127,334.

To all whom z't may concern:

Be it known that I, WILLIAM C. BRINTON, Jr., a citizen of the United States, residing at Kennett Square, county of Chester, and State of Pennsylvania, have invented a new and useful Improvement in Switch-Boxes, of which the following is a full, clear, .and eXact description, reference being had to the accompanying drawings, which vform a part of ythis specification.

The'object of my invention is to provide a closure for a switch and parts appurtenant thereto, as, for example, the controlling mechanism of an ignition system. More specifically, the object ot'4 my invention is. to provide a switch box that may be readilir assembled and 'also readily disassembled to gain access to the contained mechanism. Preferred embodiments of my invention are shown in the accompanying drawings, in which- Figure l is a plan view of the switch box with lcover plate partly broke-n away.

Fig. :2 is a vertical section through the box shown in Fig. l with parts omitted.

Fig. 3 is a perspective view of the interior members of the box.

Fig. 4 is a View, similar to Fig. 2, of a modification.

The box comprises the following parts: The firstl part comprises a metal cylindrical casing a having at the top a ange 'and at the bottom a flange c. Around the inside the casing is machined out. for a short distance below the top, forming an annular shoulder d. The second part a spider coniprising a metal `top e having (say) three downwardly proiecting legs 7 at uniform distances apart. The third part is a disk g of any suitable rigid no1i.-slirinkable dielectric material provided with recessses L in its periphery corresponding to, and ada pted to receive, the legs f. A fourth part is described hereinafter.

The top e is of a diameter corresponding substantially to the internal diameter ot' the.

casing a above the shoulder d. The legsl f are not flush with theperiphery of the top e but are set within the same a distance about equal to the width of the shoulder d. The thickness of the top e is equal to about the depth of the cut-out part above the shoulder al. "lhe spider may, therefore` be inserted into the casing a from the top until the top e contacts with the shoulder d. and the legs of the spider will have a free sliding' lit against the inner wall ol the casing. Before the spider is inserted inthe casing. the disk g of noli-conducting material is applied to the legs f by simply sliding it on the legs edgewise until the/under face of the disk is iiiish with the. 'lower ends of the legs. The lower end of each leg is 'provided with a countersink alining with a. screw threaded hole in the base of the. corrcspomiing recess l1., and the spider is attached to the disk by screws. The

`flange c conceals the lower ends of the legs j but. otherwise performs no useful function, although this flange could be untilized to support the disk if the support-ing means at. the top were omitted.

All the switch mechanism which is rcquiri-al-to be insulated from the box or Casing is mounted on the disk g, which forms the. bottom of the box. Thus. where the switch box` is employed to cont-ain the controlling mechanism an ignition system, the bottom f/ carries the two binding posts i'. the switch contacts j, the vibrator k and the condenser m. The hole o in the top e is adapted to receive a turnable plug (not shown) carrying the member or members adapted to bridge the switch contacts.

Overlying and rivited to the top e oi the spider is a thin metalk cover plate p which has a hole alining with the hole o. A bushing p is fitted tightly in the two holes` preserving their alinenient. Then the spider e j (carryinggthe pflate p) and disk y are inserted 'within the casing from the top, the plate p is screwed to the flange of the casing. This prevents the spider and disk from turning in the casing. Removing the screws permits the ready removal of the spider, the disk g and the switch mechanism 'mounted on the latter.

In Fig. et the casing a is shown as provided with a bottom r, thus forming a cup for the reception of the spider and t-lie disk of insulating material. The disk itself and its mode of attachment to the spider is the same as hereinbefore described except. that it is provided with a knob s projecting downwardly from the disk through a hole in the bottom r, The knob projects substantially below the lower` face of the bottom r so that the metal binding post, the

threaded lower end t of which vdepends from the knob, cannot contact with the metal bottom 0f the boX-. v

Having now fully' described my invention, what I desire to claim and Letters Patent is:

1. A switch box comprising -ar casing; a

top plate and a 'bottom plate, the latter a non-conductor and fitting Within the casing ladjacent; its lower edge; legs connecting` the peripheral portion of the two plates and extending within the casing adj acent its inner vcircumferential Wall, and switch mechanism mounted onA the lower plate; the said plates 4and legs being removable from and insertadapted to the internal diameter of the cas-'YV ing; and a plate overlying and secured to said top plate and the upper face of the casing surrounding the spider: the top plate holding said legs and insulating disk in position within the casing.

3. A switch box comprising a casing; means applicable to and removable from protect byv box colriprisingv a easing;l

the casing in the direction of the axis of the casing, sald means comprlsmg a top plate,

legs depending from the peripheral portion of the top plate and an insulating disk: both said legs and said disk adapted to the internal diameter of the easing and the disk beingl recessed in its periphery to receive the lower ends of the legs.

4. A switch box comprising a casing having an outturned flange at its top and cut away to form an internal annular shoulder; a spider composed of a top plate equal in depth to the depth of the cut-away part of the casing and resting upon said shoulder; legs depending from the top plate; and an insulating disk fitting "within the casing and secured to said legs.

5. A switch box comprising a casing having an outturned ange at its top and eut away around its inner upper edge to form an internal annular shoulder; a spider coinposed of a top plate of a thickness equal to the depth of the cut-away part of the casing and resting upon said shoulder, and legs depending from the top plate; an insulating disk fitting within the lower end of the casing and having recesses in its periphery accommodating said legs; and a plate overlying and secured to the` top plate and the flanged upper end of the casing.

In testimony of which invention, l have hereunto set my hand. at Philadelphia. Penna., on this 23rd day of October, 1916.

WILLIAM C. BRINTON, Ju. 

